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DOI | 10.1007/S00289-011-0505-0 | ||||
Año | 2011 | ||||
Tipo | artículo de investigación |
Citas Totales
Autores Afiliación Chile
Instituciones Chile
% Participación
Internacional
Autores
Afiliación Extranjera
Instituciones
Extranjeras
The goal was to remove arsenate species in the presence of competitive anions by coupling of liquid-phase polymer-based retention, LPR, a procedure based on the selective As(V) adsorption properties of cationic water-soluble polymers, with an electro-catalytic oxidation process (EO) of As(III) into its more easily removable As(V). The electro-catalytic oxidation of As(III) to As(V) was performed with an organic supporting electrolyte, poly[3-(methacryloylamine)propyl)]trimethyl ammonium chloride, P(ClMPTA), which is recognized as an efficient reagent in removing divalent arsenate species. The bulk electro-catalytic conversion of As(III) to As(V) was carried out with a Pt-gauze electrode, and the resulting mixtures were introduced into a LPR cell to remove the As(V)-polymer adducts. Using P(ClMPTA) and ammonium salts at a 20:1 polymer:As(III) molar ratio at pH 8, complete (100%) Arsenic retention was achieved. For binary mixtures of Arsenic with competitive anions (e.g., SO4 (2-), HPO4 (2-), NO3 (-), and NO2 (-)), the retention profile varied in the range 100-70%. In addition, the As(V) retention efficiency was found to be directly related to the consumed charge in the mol ratio As(III) in solution with competitive anionic species.
Ord. | Autor | Género | Institución - País |
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1 | Del Carmen Aguirre, Maria del Carmen | Mujer |
Famaf Natl Univ Cordoba - Argentina
Universidad Nacional de Córdoba - Argentina |
2 | RIVAS-QUIROZ, BERNABE LUIS | - |
Universidad de Concepción - Chile
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3 | PENA-FARFAL, CARLOS GUSTAVO | Hombre |
Universidad de Concepción - Chile
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4 | Basaez, L. | Hombre |
Universidad de Concepción - Chile
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